If that's the way you opened it up with the original cap and it had been working, I'd say the silkscreen is wrong on the board. Also the cap doesn't look distressed, no bulge or leakage. If the unit has been working always install the way you found it. It's not uncommon to find a mistake like that.

Just repaired a 1060(e) amp. (S/N: 528709) with no sound from right channel.
With external signal supplied to Main-In RCA sockets the problem persisted so clearly had to be on the P700 board.
DC check on the pre-amplifying transistor H701 shows zero Volt on all pins so evidently it's not receiving any supply voltage through R709.
Voltage across C703, which is not short-circuited is also zero Volt, so problem must be further up the supply chain.
Here R707 is found to be 100% open.
Now about errors or production changes:
In the original schematic supplied with the amp. and on any other schematic and service-manuals I've seen for the 1060, the values for R707 is 18KOhm and for R709 is 5,6KOhm. Besides R759 8,2KOhm is present across C703.
In the real world R759 is absent, as shown on the attached P700 components layout.
Further more R707 is 33KOhm and R709 is 3,9KOhm.
-
A check on R708, the left channel counterpart for R707 showed it to be out of spec's at 44,5KOhm.
Clearly it was also far down the road to oblivion.
This made me think about possible causes for this resistor to go belly-up.
In this 1060 both resistors were covered with spilled glue used to fixate C703 & C704.
I've seen old glue become conducting and to heavily corrode component leads.
If this is actually the cause of the resistor failure, many 1060 amp's should be showing this problem around now.
A quick way to check for possible issues would be to measure the DC voltage at the upper ends of R707/R708.
Here you should find around +13V at volume fully down.
Half a Volt +/- is OK, but voltages should be similar within 0,5V.

The service manual for the SR4000 (from 1980 not the later AV receiver) has an error. On page 22 (23 of the pdf). Capacitors C801 and C802 are listed as 1,000 mF. That should be 10,000 mF.

I have several of these receivers and they come equipped with 10,000 mF capacitors. 1,000 mF is way too small for the bridge rectifier smoothing capacitors on an amp this size. This came to my attention when I got one of these receivers that someone had dutifully installed 1,000 mf caps in.